We are given a geometric progression (GP) where the first term is 3 and the 5th term is 48. We need to find the common ratio of the GP.

AlgebraGeometric ProgressionSequences and SeriesExponents
2025/4/10

1. Problem Description

We are given a geometric progression (GP) where the first term is 3 and the 5th term is
4

8. We need to find the common ratio of the GP.

2. Solution Steps

Let aa be the first term of the geometric progression and rr be the common ratio. The nnth term of a GP is given by:
an=ar(n1)a_n = a * r^(n-1)
We are given that the first term a=3a = 3 and the 5th term a5=48a_5 = 48. Thus, we can write the equation for the 5th term as:
a5=ar(51)a_5 = a * r^(5-1)
48=3r448 = 3 * r^4
Now we solve for rr:
r4=483r^4 = \frac{48}{3}
r4=16r^4 = 16
Taking the fourth root of both sides:
r=164r = \sqrt[4]{16}
r=2r = 2

3. Final Answer

The common ratio is

2. So the answer is A.

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